C++/Data Type/Octal
Reads integral decimal values and generates octal, decimal, and hexadecimal output
#include <iostream>
using namespace std;
int main()
{
int number;
cout << "Please enter an integer: ";
cin >> number;
cout << uppercase
<< " octal \t decimal \t hexadecimal\n "
<< oct << number << " \t "
<< dec << number << " \t "
<< hex << number << endl;
return 0;
}